Fair Value of Financial Instruments (Details Narrative) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Total
Assets:
Money market funds (cash equivalents)	$ 11,913	$ 27,096
Corporate notes and bonds	13,827	11,460
Asset-backed securities	254	500
Total assets measured at fair value	25,994	39,056
Significant Unobservable Inputs (Level 3)
Assets:
Money market funds (cash equivalents)
Corporate notes and bonds
Asset-backed securities
Total assets measured at fair value
Significant Other Observable Inputs (Level 2)
Assets:
Money market funds (cash equivalents)
Corporate notes and bonds	13,827	11,460
Asset-backed securities	254	500
Total assets measured at fair value	14,081	11,960
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Money market funds (cash equivalents)	11,913	27,096
Corporate notes and bonds
Asset-backed securities
Total assets measured at fair value	$ 11,913	$ 27,096